Spark-arrester



SPARK ARRESTER.

APPLICATION man- MAY 3. 1911.

mamas, Patented Nov. 25, 1919.

4 SHEETSSHEET 1 Mam I? .29 $5; flw

attorney, 5

A. H. DICK.

SPARK ARRESTER.

APPLICATION FILED MAY 3. 1911.

Patented Nov. 25, 1919.

4 SHEETS-SHEET 2.

A. H. DICK.

SPARK ARRESTER.

APPLICATION FILED MAY s. 19H.

Patented Nov. 25, 1919.

4 SHEETS-SHEET 3- a. g I

attache/ 5 A. H. DICK.

SPARK ARRESTER. APPLICATION FILED MAY 3. 1911.

1,322,768. Patented Nov. 25, 191.9;

4 SHEETS-SHEET 4- MMM M v 5931 l "Q ARCHIBALD HASTIE DICK, 0FSGHENEdTADY, NEW YORK.

SPARK-ARRESTEB.

Specification of Letters Patent.

' Patented-Nov.25,1919.

Application filed May 3, 1917. Serial-N0. 166,255.

To all whom it may concern:

Be it known that I, ARCHIBALD H.'DIGK, a subject of the King of GreatBritain and Ireland, who have declared my intention to become a citizenof the United States, am a resident of Schenectady, in the county ofSchenectady and State of New York, temporarily residing at Rio deJaneiro, Brazil, and have invented certain new and useful Improvementsin Spark-Arresters, of which the following is a specification.

This invention relates primarily 'to front end arrangements forlocomotives, "and more specifically to a spark arrester of the rotarytype.

It has heretofore been proposed to place a rotary cylindrical screen inthe space between the exhaust nozzle and the stack of a locomotive, andto rotate it by the exhaust exhaust blast. This mechanism by breakingand deflecting the main jet of exhaust steam seriously impairs ejectoraction of the steam jet and causes an undesirable reduction of draft.

Consequently, one of the important objects of the present invention isthe provision of a type of'supporting and driving mechanism which shalldeflect only a small portion of the jet, leaving the main centralportion of the jet to pursue its normal course. This result is securedbyusing annular bearings, in combination with an annular peripheralturbine formed partly onthe exhaust nozzle, said bearings and the fluidpassages of the turbine encircling and being concentric with the centralportion of the jet. This operates efficiently with only a smallproportion of the exhaust steam, and the remaining centr'alportion ofthe jet is unimpaired either in velocity or direction." Th said turbinemay be operated either with live steam or exhaust steam, or acombination of both live steam and exhaust steam.

Other features of the invention relate to special" forms andarrangements of parts suchas the turbine rotor, screen, etc., and willbe readily understood by those skilled in the art, from the followingdescription and from the accompanying drawings, in

ment of my invention when used on a locomotive;

Fig. 3 is a section on the line 33 of Fig. 1;

Fig. 4. is a plan view of the turbine rotor;

F ig. 5 is a section on the line 5-5 of Fig. 4;

Fig. 6 nozzle;

Fig, 7 is a section on the line 7-7 of Fig. 6;

Fig. 8 is a section on the line- 8-8 of Fig. 6.

In the drawings, '9 is the exhaust pipe leading from the exhaustpassages in the saddle and 10 is the exhaust nozzle casting which isconnected to the exhaust pipe 9 by studs or bolts as shown, but may bemade in one piece therewith. An interchangeable thimble or bush. 11, isprovided for the nozzle lOand is held by studs 12. The form of thethimble 11 may be varied to adis' a plan view of the exhaust just theexhaust jet to the requirements of.

any particular service, and this makes relatively simple thestandardization of the nozzle 10 in a relatively small number of different sizes.

The nozzle 10 has, in addition to the central orifice which carries thebushing 11, an annular series of apertures 13 which serve as-turbinenozzles and conduct a relatively small quantity of exhaust steam to theturbine rotor 14. One or more of this series of apertures 13 may beutilized to conduct a relatively small quantity of live steam to theturbine motor. This live steam supply may be regulated in any convenientmanner, preferably by means of an ordinary valve in the live steamsupply pipes 29. The rotor 14' is a ring-shaped'castin'g having obliqueblades sired to reduce the consumption of steam any of the varioussclentlfic deslgns of noz I zle and bucket may be used with good efiect.

The rotor 14 in the preferred form turns in contact with a bearing plate16fast on the top of nozzle 10, and a thrust plate 21 secured to nozzle10 by studs or bolts 12, and is free to revolve thereon. It is heldcentered by a depending flange 17 running in a groove 18 formed innozzle casting 10. In

some cases it will be found desirable to provide the groove 18 withballs 19, and to --plaoe;balls 20 over flange 17, thus making the rotorof a ball bearing type as illustrated in Fig. 1.

' with nozzle bushing 11,and the bearing plate 16 may be omitted. I

. The screen structure consists of a cylindrical screen secured toconical base plate 23, to the outer flange of rotor casting 14, and tothe top ring 2 1 by either bolts or rivets. The top ring 2 1 isconstructed of a circular plate 24 and angle irons 25, and is free tomove around a depending portion 26 of the smoke stack 27. e f

While the screen members 22, 23, and 24 may be of any fora-minousmaterial such as netting or various forms of perforated plate, I showand prefer screen 22 of netting,.base plate 23 and top ring 24 of plate.

An ordinary petticoat pipe 28 may be a used in combination with thisdevice if desired. i

.Deflecting plates 30 may be used if desired when it is ;necessary toincrease the speed of the gaseous products of com bustion'throughnetting 22. The preferred arrangement as illustrated shows'thedeflecting plates 30 bolted to rotor casting 14:, but they may befastened to screen 22 either ontheinside or outside of screen 22Thelnvention is shown in Fig. 2 mounted in a locomotive smoke box, thatbeing the usual but not the exclusive field of use for the device. Theblast of the exhaust'creates a draft out through the stack in the usualmanner and a part of the exhaust, which may be assisted by livesteainfrom the holler, rotates the screen; which is. in the path ofproducts of combustion passing to the stack. As the screen moves fasterthan the cinders they are thrown back into the smoke box and out of theline of draft. Small sparks are beaten out or extinguished.

The screen thus. arrests and extinguishes sparks-andis self'clearing.The deflecting plates convey the products of combustion from the'screento the center of thev exhaust When ball bearings are used the plate 21may be made in one piece jet where they are ejected out of the stack inthe usual way. The defiectingplates also.

serve the purpose of beating out any rela.

tively small sparks which might findtheir way throughfholesin thescreen. The device offers littleobstructio'n to the draft and doesnotretard or deflect the'draft-creating blast in any substantial degree.

The possibility of certaln modifications has been'suggested and otherswill be obvious to skilled mechanics. The important feature is theprovision of. means for supporting and driving a screen of this type,without substantial interference with the exhaust blast. So far asthefeature of sup port isconcerned, it is noteven essent al that theturbine be of the exhaust, or l ve, steam variety. y y

It will be observed that under the above described construction and asplainly illustrated in the drawings, the space between the dischargeendof the exhaust nozzle 10 and the smoke pipe' or petticoat pipe'28 1swholly unobstructed, and no impediment of any sort obstructsthe exhaust.The deflecting plates .30 as will be seen upon reference to Figs. 1 and3, lie wholly outside the 011's cumference of the outlet or centraldischarge opening of nozzle 10, and in planes parallel with the axis ofrotation of the screen though tangential thereto. In other words, theylie in vertical" planes and not in planesoblique' to theaxis ofrotation, hence afford free vertical passage for the exhaust throughoutthe area of the rotating screen,

thus avoiding radial arms, fan blades, and.

the like, movable across the path of the exhaust. This conduces greatlyto the efliciency of the structure and is an important feature. of theinvention.

Having .thus described. my invention, What I claim is 1. The combinationof an exhaust nozzle; a smoke flue alined therewith and spacedtherefrom; a-; rotatable tubular screen, having an unobstructedinterior, bridging the interval between said nozzle and flue; bearingsfor said tubular screen; and a motor for rotating said screen;

ings for said tubular screenyand a motor operable by live steam from anysource for rotating said screen,

I 4.1T he combinationof an exhaust nozzle,

a smoke flue alined therewith, andv spaced -therefrom,a rotatabletubular screen, hav

steam from said exhaust nozzle and-an auxiliary supply of live steamfrom any source.

6. The combination of an exhaust nozzle having a main central exhaustopening, and one or more lateral turbine nozzle openings; a flue alinedwlth sald central exhaust opening and spaced from said exhaust nozzle; a

rotatably mounted tubular screen bridging the interval between saidnozzle and flue; and a turbine rotor connected with said screenandhaving buckets in coactive relation with said turbine nozzles.

7. The combination of an exhaust nozzle, having a main central exhaustopening, and a surrounding annular series of turbine nozzles; a fluealined with said central exhaust opening and spaced from said exhaustnozzle; a rotatably mounted tubular screen bridging the interval betweensaid nozzle and flue and inclosingsaid turbine nozzles and centralexhaust opening; and an annular series of turbine buckets mounted on theinside of said screen in coactive relation with said turbine nozzles andout of the path of steam from said central exhaust opening. 8. Thecombination of an exhaust nozzle having a main central exhaust opening,a surrounding annular series of turbine nozzles, and an annular bearing;a flue alined with said central vexhaust opening and spaced from saidexhaust nozzle; an annular turbine rotor mounted on said annular bearingand having a series of buckets in coactive relation with said nozzlesbut out of the path of steam from said centralexhaust opening; a tubularscreen rigidly mounted on said rotor and bridging the interval betweensaid exhaust nozzle and flue; and a thrust bearing for said rotor. v

9. The combination of an exhaust nozzle having a main central exhaustopening, a surrounding annular series of turbine nozzles, and an annularbearing; a flue alined with said central exhaust opening and spaced fromsaid exhaust nozzle; an annular turblne rotor mounted on said annularbearing and having aseries ofbuckets lin coactiv'e relation with "saidnozzles but out'of the path or steam from said central exhaust opening;a tubular screen rigidly 1no1n 1ted on said rotor outside said bucketsfandbridging the interval between said exhaust nozzle and flue and athrust-bearing for said rotor.

' .10. The combination of an exhaust nozzle I having a main centralexhaustopening, a.v

surrounding annular series of turbine nozzles, and an annular bearing; aflue alined with said central exhaust opening and spaced from saidexhaust nozzle; an annular turbine'rotor mounted on said annular bearingand having a series of buckets in coactive relation with said nozzlesbut out of the path of steam from said central exhaust 7 opening;

interval between said exhaust nozzle and flue; and a thrust bearing forsaid rotor serving to hold the rotors to its seat.

11. A removable exhaust nozzle and spark arrester unit, adapted to beinterposed be- "tween the exhaust pipe and stack of a locomotive,.andcomprising in combination an exhaust nozzle provldeol with attachlngmeans, a central exhaust opening, and lateral turbine nozzles; a rotarytubular screen journaled on said exhaust nozzle and hav- 1ng turbinebuckets coacting with sald tur bine nozzles; and a thrust bearing forsaid Screen.

12. A removable exhaust nozzle and spark arrester unit, adapted to beinterposed between theexhaust'pipe and stack of a locomotive, andcomprising in combination an exhaust nozzle provided with attachingmeans, a central exhaust opening, and lateral turbine nozzles; and arotary tubular screen journaled on said exhaust nozzle and shavingturbine buckets coacting with said turbine nozzles, said screen havingat its top a collar loosely encircling a depending portion of the stack.

13. A removable exhaust nozzle and spark arrester unit adapted tobeinterposed between the exhaust pipe and stack of a locomotive, andcomprising in combination an exhaust nozzle provided with l attachingmeans, a central exhaust opening and an annular series of turbinenozzles surrounding said central exhaust opening; and a rotary tubularscreen journaled on said exhaust nozzle and having on its inner side aplurality of turbine buckets in coactive relation with said turbinenozzles and out of the path of steam from said central exhaust opening;said screen having at its top a collar loosely encircling a dependingportion of the stack.

14. The combination of an exhaust nozzle, a smoke flue alined therewithand spaced a tubular screeirrigidly. mounted on said rotor and bridgingthe] "therefrom; a rotetable tubuiar screen, hawing an unobstructedpassage for 'the exhaust blast, bridging the interval between said .terOf 'fihe exhaust bl st; and v motor f retatirigseldscreem tien pessingthrough s aid screeh'to the gen-'- In test? Orly} w re 51,2 59 5

